Yes, as we are talking about this season, the one that dominates the top of the French League is PSG. There is no other team that can beat PSG at the top of the French League standings, even though they are at the bottom followed by Monaco and Marseille, they also cannot catch up with the points that PSG has collected. There is high hope that PSG will to become champion in the French League at the end of the season.
I agree with you that only the French League and Domestic League can be achieved by PSG, whereas in the European League it seems to be a burden with big teams from all leagues so PSG's steps to qualify for the next round I doubt it.
In the Champions League, it is still appropriate to doubt PSG this season because PSG's performance there is still far from satisfactory. But in Ligue 1, it is quite clear that PSG is still very strong compared to other candidates, only a team as big as PSG should be able to get something more because trophies like Ligue 1 are very common for them every season. So PSG must be able to improve themselves outside Ligue 1 so that the team is not underestimated by rivals from other Leagues when playing in competitions like the Champions League.
PSG has indeed monopolized the French League for several years, so it is not surprising that they always dominate the French League every season even though some star players have left, but that does not make them weak because the foundation has been applied from season to season. Even though many of their star players have left, their squad remains luxurious compared to their rivals in the French League. This is the same as the Bundesliga a few seasons ago which was always dominated by Bayern Munich, even for 11 seasons they dominated the Bundesliga, the only difference is that Bayern Munich is also successful in this UCL league, unlike PSG who always fails in the UCL league.
This season PSG also finds it very difficult to qualify for the play-off round, especially since they will face Man City who are currently slowly starting to rise after previously slumping. If PSG loses to Man City PSG's hopes in the UCL will be gone, this will be a tough task for Enrique this season. They are comfortable in the French League but not in the UCL League.